Long-Term Debt And Borrowing Arrangements (Summary Of Indebtedness-Long-Term Debt) (Details) - USD ($) $ in Millions | Jun. 30, 2017 | Dec. 31, 2016 | May 31, 2015 |
Debt Instrument [Line Items] | | | |
Less: Current portion of securitized vacation ownership debt | $ 185 | $ 195 | |
Long-term securitized vacation ownership debt | 1,867 | 1,946 | |
Less: Current portion of long-term debt | 41 | 34 | |
Long-term vacation ownership contract receivables | $ 3,120 | 3,079 | |
2.95% Senior Unsecured Notes (Due March 2017) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 2.95% | | |
5.75% Senior Unsecured Notes (Due February 2018) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 5.75% | | |
2.50% Senior Unsecured Notes (Due March 2018) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 2.50% | | |
7.375% Senior Unsecured Notes (Due March 2020) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 7.375% | | |
5.625% Senior Unsecured Notes (Due March 2021) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 5.625% | | |
4.25% Senior Unsecured Notes (Due March 2022) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 4.25% | | |
3.90% Senior Unsecured Notes (Due March 2023) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 3.90% | | |
4.15% Senior Unsecured Notes (Due April 2024) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 4.15% | | |
5.10% Senior Unsecured Notes (Due October 2025) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 5.10% | | |
4.50% Senior Unsecured Notes (Due April 2027) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 4.50% | | |
Term Notes [Member] | | | |
Debt Instrument [Line Items] | | | |
Secured Debt | $ 1,648 | 1,857 | |
Debt Issuance Cost | 22 | 24 | |
Bank Conduit Facility (Due August 2018) [Member] | | | |
Debt Instrument [Line Items] | | | |
Secured Debt | 404 | 284 | |
Securitized Vacation Ownership Debt [Member] | | | |
Debt Instrument [Line Items] | | | |
Secured Debt | 2,052 | 2,141 | |
Less: Current portion of securitized vacation ownership debt | 185 | 195 | |
Long-term securitized vacation ownership debt | 1,867 | 1,946 | |
Long-term vacation ownership contract receivables | 2,558 | 2,601 | |
Revolving Credit Facility [Member] | | | |
Debt Instrument [Line Items] | | | |
Revolving credit facility | 9 | | |
Commercial paper | 355 | | |
Revolving Credit Facility [Member] | Revolving Credit Facility (Due July 2020) [Member] | | | |
Debt Instrument [Line Items] | | | |
Revolving credit facility | 9 | 14 | |
Commercial Paper [Member] | | | |
Debt Instrument [Line Items] | | | |
Commercial paper | 355 | 427 | |
Other [Member] | | | |
Debt Instrument [Line Items] | | | |
Capital leases | 144 | 143 | |
Other | 35 | 20 | |
Total long-term debt | 3,708 | 3,371 | |
Less: Current portion of long-term debt | 41 | 34 | |
Long-term debt | 3,667 | 3,337 | |
Other [Member] | Term Loan (Due March 2021) [Member] | | | |
Debt Instrument [Line Items] | | | |
Other | 324 | 323 | |
Other [Member] | 2.95% Senior Unsecured Notes (Due March 2017) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 300 | | |
Senior notes | 0 | 300 | |
Other [Member] | 5.75% Senior Unsecured Notes (Due February 2018) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 14 | | |
Senior notes | 14 | 14 | |
Other [Member] | 2.50% Senior Unsecured Notes (Due March 2018) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 450 | | |
Senior notes | 449 | 449 | |
Other [Member] | 7.375% Senior Unsecured Notes (Due March 2020) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 40 | | |
Senior notes | 40 | 40 | |
Other [Member] | 5.625% Senior Unsecured Notes (Due March 2021) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 250 | | |
Senior notes | 248 | 248 | |
Other [Member] | 4.25% Senior Unsecured Notes (Due March 2022) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 650 | | |
Senior notes | 648 | 648 | |
Unamortized (gains)/losses from the settlement of a derivative | 2 | (2) | |
Other [Member] | 3.90% Senior Unsecured Notes (Due March 2023) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 400 | | |
Senior notes | 406 | 407 | |
Unamortized (gains)/losses from the settlement of a derivative | 8 | 9 | |
Other [Member] | 4.15% Senior Unsecured Notes (Due April 2024) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 300 | | |
Senior notes | 297 | 0 | |
Other [Member] | 5.10% Senior Unsecured Notes (Due October 2025) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 350 | | |
Senior notes | 339 | 338 | |
Unamortized (gains)/losses from the settlement of a derivative | (8) | (9) | |
Other [Member] | 4.50% Senior Unsecured Notes (Due April 2027) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, face amount | 400 | | |
Senior notes | 400 | 0 | |
Derivative, Amount of Hedged Item | 4 | | |
Senior Notes [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt Issuance Cost | 5 | 4 | |
Unamortized discount | 15 | 11 | |
Interest Rate Swap [Member] | | | |
Debt Instrument [Line Items] | | | |
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge | $ 10 | $ 11 | $ 17 |
Interest Rate Swap [Member] | 4.25% Senior Unsecured Notes (Due March 2022) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 4.25% | | |
Interest Rate Swap [Member] | 3.90% Senior Unsecured Notes (Due March 2023) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 3.90% | | |
Interest Rate Swap [Member] | 4.50% Senior Unsecured Notes (Due April 2027) [Member] | | | |
Debt Instrument [Line Items] | | | |
Debt instrument, interest rate, stated percentage | 4.50% | | |