Fair Value (Detail) - USD ($) $ in Millions | Sep. 25, 2021 | Dec. 26, 2020 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Reverse repurchase agreements | $ 1,350 | $ 1,900 |
Trading assets, Fair Value Disclosure | 22,761 | 15,738 |
Derivative assets, Fair Value Disclosure | 1,295 | 2,235 |
Derivative liabilities, Fair Value Disclosure | 408 | 711 |
Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | 38,497 | 30,257 |
Liabilities, Fair Value Disclosure | 565 | 815 |
Fair Value, Nonrecurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Grants & loans Receivable, Reverse repurchase agreements, CV | 399 | 139 |
Short-term and Long-term Debt, Fair Value | 44,600 | 40,900 |
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 5,121 | 3,815 |
Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 4,081 | 2,978 |
Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 13,559 | 8,945 |
Marketable Equity Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,064 | 1,830 |
Cash Equivalents [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Reverse repurchase agreements | 1,350 | 1,900 |
Cash Equivalents [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 736 | 50 |
Cash Equivalents [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,753 | 3,417 |
Cash Equivalents [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,364 | 0 |
Short-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 870 | 428 |
Short-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,066 | 1,179 |
Short-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 1,068 | 685 |
Other Current Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 327 | 692 |
Loans receivable, Fair Value Disclosure | 211 | 439 |
Other Long-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 684 | 1,520 |
Other Long-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 203 | 257 |
Other Long-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 66 | 415 |
Other Long-Term Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 974 | 1,550 |
Loans receivable, Fair Value Disclosure | 0 | 157 |
Other Accrued Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 556 | 810 |
Other Long-Term Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 9 | 5 |
Level 1 [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | 4,578 | 3,096 |
Liabilities, Fair Value Disclosure | 29 | 0 |
Level 1 [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 67 | 131 |
Level 1 [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Marketable Equity Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 272 | 136 |
Level 1 [Member] | Cash Equivalents [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Reverse repurchase agreements | 0 | 0 |
Level 1 [Member] | Cash Equivalents [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Cash Equivalents [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,035 | 2,781 |
Level 1 [Member] | Cash Equivalents [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,200 | 0 |
Level 1 [Member] | Short-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Short-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Short-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Other Current Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 4 | 48 |
Loans receivable, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Other Long-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Other Long-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Other Long-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Other Long-Term Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 0 | 0 |
Loans receivable, Fair Value Disclosure | 0 | 0 |
Level 1 [Member] | Other Accrued Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 29 | 0 |
Level 1 [Member] | Other Long-Term Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 0 | 0 |
Level 2 [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | 33,906 | 27,131 |
Liabilities, Fair Value Disclosure | 536 | 815 |
Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 5,121 | 3,815 |
Level 2 [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 4,014 | 2,847 |
Level 2 [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 13,559 | 8,945 |
Level 2 [Member] | Marketable Equity Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 1,792 | 1,694 |
Level 2 [Member] | Cash Equivalents [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Reverse repurchase agreements | 1,350 | 1,900 |
Level 2 [Member] | Cash Equivalents [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 736 | 50 |
Level 2 [Member] | Cash Equivalents [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 718 | 636 |
Level 2 [Member] | Cash Equivalents [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 164 | 0 |
Level 2 [Member] | Short-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 870 | 428 |
Level 2 [Member] | Short-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 2,066 | 1,179 |
Level 2 [Member] | Short-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 1,068 | 685 |
Level 2 [Member] | Other Current Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 323 | 644 |
Loans receivable, Fair Value Disclosure | 211 | 439 |
Level 2 [Member] | Other Long-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 684 | 1,520 |
Level 2 [Member] | Other Long-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 203 | 257 |
Level 2 [Member] | Other Long-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 66 | 415 |
Level 2 [Member] | Other Long-Term Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 961 | 1,520 |
Loans receivable, Fair Value Disclosure | 0 | 157 |
Level 2 [Member] | Other Accrued Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 527 | 810 |
Level 2 [Member] | Other Long-Term Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 9 | 5 |
Level 3 [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | 13 | 30 |
Liabilities, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Trading assets, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Marketable Equity Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Cash Equivalents [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Reverse repurchase agreements | 0 | 0 |
Level 3 [Member] | Cash Equivalents [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Cash Equivalents [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Cash Equivalents [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Short-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Short-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Short-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Current Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 0 | 0 |
Loans receivable, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Long-Term Investments [Member] | Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Long-Term Investments [Member] | Fixed Income Securities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Long-Term Investments [Member] | Government Debt [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Long-Term Assets [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets, Fair Value Disclosure | 13 | 30 |
Loans receivable, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Accrued Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | 0 | 0 |
Level 3 [Member] | Other Long-Term Liabilities [Member] | Fair Value, Recurring [Member] | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities, Fair Value Disclosure | $ 0 | $ 0 |