Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014 |
Current assets: | | | | |
Cash and cash equivalents | $ 40 | $ 58 | $ 303 | $ 337 |
Accounts receivable, net | 451 | 469 | | |
Accounts receivable from affiliates | 0 | 0 | | |
Inventories, net | 547 | 541 | | |
Note, advance and interest receivable from parent | 0 | 0 | | |
Notes and interest receivable from affiliates | 0 | 0 | | |
Other current assets | 48 | 43 | | |
Total current assets | 1,086 | 1,111 | | |
Fixed assets, net | 1,801 | 1,810 | | |
Amortizable intangible assets, net | 101 | 105 | | |
Goodwill | 61 | 59 | | |
Deferred income tax assets | 1,025 | 982 | | |
Notes receivable from parent | 0 | 0 | | |
Notes receivable from affiliates | 0 | 0 | | |
Investments in consolidated subsidiaries and affiliates | 0 | 0 | | |
Other assets | 171 | 153 | | |
Total assets | 4,245 | 4,220 | | |
Current liabilities: | | | | |
Accounts payable and accrued liabilities | 473 | 436 | | |
Current portion of long-term debt | 1 | 1 | | |
Accounts payable to affiliates | 0 | 0 | | |
Note, advance and interest payable to subsidiaries | 0 | 0 | | |
Notes and interest payable to affiliates | 0 | 0 | | |
Total current liabilities | 474 | 437 | | |
Long-term debt, net of current portion | 610 | 590 | | |
Notes payable to subsidiaries | 0 | 0 | | |
Notes payable to affiliates | 0 | 0 | | |
Pension and other postretirement benefit obligations | 1,188 | 1,186 | | |
Deferred income tax liabilities | 2 | 2 | | |
Other liabilities | 56 | 60 | | |
Total liabilities | 2,330 | 2,275 | | |
Total equity | 1,915 | 1,945 | 2,073 | 2,117 |
Total liabilities and equity | 4,245 | 4,220 | | |
Parent [Member] | | | | |
Current assets: | | | | |
Cash and cash equivalents | 0 | 0 | 0 | 0 |
Accounts receivable, net | 0 | 0 | | |
Accounts receivable from affiliates | 0 | 0 | | |
Inventories, net | 0 | 0 | | |
Note, advance and interest receivable from parent | 0 | 0 | | |
Notes and interest receivable from affiliates | 0 | 0 | | |
Other current assets | 0 | 0 | | |
Total current assets | 0 | 0 | | |
Fixed assets, net | 0 | 0 | | |
Amortizable intangible assets, net | 0 | 0 | | |
Goodwill | 0 | 0 | | |
Deferred income tax assets | 0 | 0 | | |
Notes receivable from parent | 0 | 0 | | |
Notes receivable from affiliates | 0 | 0 | | |
Investments in consolidated subsidiaries and affiliates | 4,077 | 4,067 | | |
Other assets | 0 | 0 | | |
Total assets | 4,077 | 4,067 | | |
Current liabilities: | | | | |
Accounts payable and accrued liabilities | 4 | 5 | | |
Current portion of long-term debt | 0 | 0 | | |
Accounts payable to affiliates | 455 | 433 | | |
Note, advance and interest payable to subsidiaries | 366 | 62 | | |
Notes and interest payable to affiliates | 0 | 0 | | |
Total current liabilities | 825 | 500 | | |
Long-term debt, net of current portion | 590 | 589 | | |
Notes payable to subsidiaries | 428 | 710 | | |
Notes payable to affiliates | 0 | 0 | | |
Pension and other postretirement benefit obligations | 0 | 0 | | |
Deferred income tax liabilities | 0 | 0 | | |
Other liabilities | 0 | 1 | | |
Total liabilities | 1,843 | 1,800 | | |
Total equity | 2,234 | 2,267 | | |
Total liabilities and equity | 4,077 | 4,067 | | |
Guarantor Subsidiaries [Member] | | | | |
Current assets: | | | | |
Cash and cash equivalents | 6 | 13 | 261 | 257 |
Accounts receivable, net | 310 | 323 | | |
Accounts receivable from affiliates | 455 | 421 | | |
Inventories, net | 255 | 257 | | |
Note, advance and interest receivable from parent | 366 | 62 | | |
Notes and interest receivable from affiliates | 49 | 48 | | |
Other current assets | 34 | 21 | | |
Total current assets | 1,475 | 1,145 | | |
Fixed assets, net | 649 | 629 | | |
Amortizable intangible assets, net | 44 | 46 | | |
Goodwill | 61 | 59 | | |
Deferred income tax assets | 0 | 0 | | |
Notes receivable from parent | 428 | 710 | | |
Notes receivable from affiliates | 113 | 105 | | |
Investments in consolidated subsidiaries and affiliates | 2,025 | 2,047 | | |
Other assets | 54 | 48 | | |
Total assets | 4,849 | 4,789 | | |
Current liabilities: | | | | |
Accounts payable and accrued liabilities | 218 | 189 | | |
Current portion of long-term debt | 1 | 1 | | |
Accounts payable to affiliates | 381 | 260 | | |
Note, advance and interest payable to subsidiaries | 0 | 0 | | |
Notes and interest payable to affiliates | 0 | 0 | | |
Total current liabilities | 600 | 450 | | |
Long-term debt, net of current portion | 20 | 1 | | |
Notes payable to subsidiaries | 0 | 0 | | |
Notes payable to affiliates | 0 | 0 | | |
Pension and other postretirement benefit obligations | 343 | 352 | | |
Deferred income tax liabilities | 1 | 0 | | |
Other liabilities | 24 | 24 | | |
Total liabilities | 988 | 827 | | |
Total equity | 3,861 | 3,962 | | |
Total liabilities and equity | 4,849 | 4,789 | | |
Non-Guarantor Subsidiaries [Member] | | | | |
Current assets: | | | | |
Cash and cash equivalents | 34 | 45 | 42 | 80 |
Accounts receivable, net | 141 | 146 | | |
Accounts receivable from affiliates | 381 | 272 | | |
Inventories, net | 298 | 290 | | |
Note, advance and interest receivable from parent | 0 | 0 | | |
Notes and interest receivable from affiliates | 0 | 0 | | |
Other current assets | 14 | 22 | | |
Total current assets | 868 | 775 | | |
Fixed assets, net | 1,152 | 1,181 | | |
Amortizable intangible assets, net | 57 | 59 | | |
Goodwill | 0 | 0 | | |
Deferred income tax assets | 1,024 | 981 | | |
Notes receivable from parent | 0 | 0 | | |
Notes receivable from affiliates | 0 | 0 | | |
Investments in consolidated subsidiaries and affiliates | 0 | 0 | | |
Other assets | 117 | 105 | | |
Total assets | 3,218 | 3,101 | | |
Current liabilities: | | | | |
Accounts payable and accrued liabilities | 251 | 242 | | |
Current portion of long-term debt | 0 | 0 | | |
Accounts payable to affiliates | 0 | 0 | | |
Note, advance and interest payable to subsidiaries | 0 | 0 | | |
Notes and interest payable to affiliates | 49 | 48 | | |
Total current liabilities | 300 | 290 | | |
Long-term debt, net of current portion | 0 | 0 | | |
Notes payable to subsidiaries | 0 | 0 | | |
Notes payable to affiliates | 113 | 105 | | |
Pension and other postretirement benefit obligations | 845 | 834 | | |
Deferred income tax liabilities | 1 | 2 | | |
Other liabilities | 32 | 35 | | |
Total liabilities | 1,291 | 1,266 | | |
Total equity | 1,927 | 1,835 | | |
Total liabilities and equity | 3,218 | 3,101 | | |
Consolidating Adjustments [Member] | | | | |
Current assets: | | | | |
Cash and cash equivalents | 0 | 0 | $ 0 | $ 0 |
Accounts receivable, net | 0 | 0 | | |
Accounts receivable from affiliates | (836) | (693) | | |
Inventories, net | (6) | (6) | | |
Note, advance and interest receivable from parent | (366) | (62) | | |
Notes and interest receivable from affiliates | (49) | (48) | | |
Other current assets | 0 | 0 | | |
Total current assets | (1,257) | (809) | | |
Fixed assets, net | 0 | 0 | | |
Amortizable intangible assets, net | 0 | 0 | | |
Goodwill | 0 | 0 | | |
Deferred income tax assets | 1 | 1 | | |
Notes receivable from parent | (428) | (710) | | |
Notes receivable from affiliates | (113) | (105) | | |
Investments in consolidated subsidiaries and affiliates | (6,102) | (6,114) | | |
Other assets | 0 | 0 | | |
Total assets | (7,899) | (7,737) | | |
Current liabilities: | | | | |
Accounts payable and accrued liabilities | 0 | 0 | | |
Current portion of long-term debt | 0 | 0 | | |
Accounts payable to affiliates | (836) | (693) | | |
Note, advance and interest payable to subsidiaries | (366) | (62) | | |
Notes and interest payable to affiliates | (49) | (48) | | |
Total current liabilities | (1,251) | (803) | | |
Long-term debt, net of current portion | 0 | 0 | | |
Notes payable to subsidiaries | (428) | (710) | | |
Notes payable to affiliates | (113) | (105) | | |
Pension and other postretirement benefit obligations | 0 | 0 | | |
Deferred income tax liabilities | 0 | 0 | | |
Other liabilities | 0 | 0 | | |
Total liabilities | (1,792) | (1,618) | | |
Total equity | (6,107) | (6,119) | | |
Total liabilities and equity | $ (7,899) | $ (7,737) | | |