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Debt - Senior Unsecured Notes - Narrative (Details) |  |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 06, 2018 EUR (€) | May 21, 2018 USD ($) Tender $ / shares | May 23, 2017 USD ($) | May 12, 2015 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€) | Jun. 08, 2018 EUR (€) | Jun. 06, 2018 USD ($) | Jun. 06, 2018 EUR (€) | May 12, 2015 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument net issue discount |  |  |  |  | $ 8,000,000 | $ 10,000,000 |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | 0 | (38,000,000) | $ (1,000,000) |  |  |  |  |  |
PFOA MDL Settlement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement payments |  |  | $ 335,000,000 |  |  |  |  |  |  |  |  |  |
6.625% Senior Unsecured Notes Due May 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | $ 908,000,000 | $ 908,000,000 |  |  |  |  |  |  |
Debt instrument interest rate |  |  |  |  | 6.625% | 6.625% |  | 6.625% | 6.625% |  |  |  |
Debt instrument maturity date |  |  |  |  | May 31, 2023 |  |  |  |  |  |  |  |
4.000% Senior Unsecured Notes Due May 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | $ 501,000,000 | $ 513,000,000 |  | € 450,000,000 | € 450,000,000 |  |  |  |
Debt instrument interest rate |  |  |  |  | 4.00% | 4.00% |  | 4.00% | 4.00% |  |  |  |
Senior unsecured notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 2,503,000,000 |  |  |  |  |  |  |  |  |
Senior unsecured notes, payment terms |  |  |  |  | The Original Notes required or require, as applicable, payment of principal at maturity and payments of interest semi-annually in cash and in arrears on May 15 and November 15 of each year. |  |  |  |  |  |  |  |
Net proceeds from issuance of long term debt |  |  | 489,000,000 |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | 2026 Euro Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from offering | € | € 445,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | Redemption of 2023 Euro Notes and Issuance of 2026 Euro Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  |  | $ 35,000,000 |  |  |  |  |  |  |
Senior unsecured notes [Member] | Dollar Tender Offer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tender offer aggregate purchase price |  |  |  |  |  |  |  |  |  |  | $ 264,000,000 |  |
Tender offer early participation premium |  |  |  |  |  |  |  |  |  |  | 13,000,000 |  |
Tender offer accrued interest |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |
Senior unsecured notes [Member] | Euro Tender Offer [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tender offer aggregate purchase price | € |  |  |  |  |  |  |  |  |  | € 310,000,000 |  |  |
Tender offer early participation premium | € |  |  |  |  |  |  |  |  |  | 14,000,000 |  |  |
Tender offer accrued interest | € |  |  |  |  |  |  |  |  |  | € 1,000,000 |  |  |
Senior unsecured notes [Member] | 6.625% Senior Unsecured Notes Due May 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, face amount |  |  |  | $ 1,350,000,000 |  |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  |  | 6.625% |  |  |  |  |  |  |  |  | 6.625%
Debt instrument maturity date |  |  |  | May 31, 2023 |  |  |  |  |  |  |  |  |
Debt instrument outstanding amount |  | $ 250,000,000 |  | $ 250,000,000 |  |  |  |  |  |  | $ 250,000,000 |  |
Number of tender offers | Tender |  | 2 |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | 6.625% Senior Unsecured Notes Due May 2023 [Member] | Dollar Tender Offer [Member] | Tender Offer Purchase Price One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tender offer purchase price per share | $ / shares |  | $ 1,052.50 |  |  |  |  |  |  |  |  |  |  |
Tender offer principal amount price per share |  | 1,000.00 |  |  |  |  |  |  |  |  |  |  |
Tender offer expiration date |  | Jun. 04, 2018 |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | 6.625% Senior Unsecured Notes Due May 2023 [Member] | Dollar Tender Offer [Member] | Tender Offer Purchase Price Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tender offer purchase price per share | $ / shares |  | $ 1,022.50 |  |  |  |  |  |  |  |  |  |  |
Tender offer principal amount price per share |  | 1,000.00 |  |  |  |  |  |  |  |  |  |  |
Tender offer expiration date |  | Jun. 18, 2018 |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | 2025 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, face amount |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  |  | 7.00% |  |  |  |  |  |  |  |  | 7.00%
Debt instrument maturity date |  |  |  | May 31, 2025 |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | Senior Notes 6.125% Due May 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, face amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 360,000,000
Debt instrument interest rate |  |  |  | 6.125% |  |  |  |  |  |  |  |  | 6.125%
Debt instrument maturity date |  |  |  | May 31, 2023 |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | Senior Notes 6.125% Due May 2023 [Member] | Euro Tender Offer [member] | Tender Offer Purchase Price One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tender offer purchase price per share | $ / shares |  | $ 1,048.75 |  |  |  |  |  |  |  |  |  |  |
Tender offer principal amount price per share |  | 1,000.00 |  |  |  |  |  |  |  |  |  |  |
Tender offer expiration date |  | Jun. 04, 2018 |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | Senior Notes 6.125% Due May 2023 [Member] | Euro Tender Offer [member] | Tender Offer Purchase Price Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tender offer purchase price per share | $ / shares |  | $ 1,018.75 |  |  |  |  |  |  |  |  |  |  |
Tender offer principal amount price per share |  | 1,000.00 |  |  |  |  |  |  |  |  |  |  |
Tender offer expiration date |  | Jun. 18, 2018 |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | Original Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Obligation threshold for debt to become guaranteed |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |
Repurchase price obligation, percentage of principal amount redeemed in event of change of control |  |  |  | 101.00% |  |  |  |  |  |  |  |  | 101.00%
Repurchase price obligation, percentage of principal amount redeemed in event of change of asset dispositions |  |  |  | 100.00% |  |  |  |  |  |  |  |  | 100.00%
Senior unsecured notes [Member] | 2027 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  | 5.375% |  |  |  |  |  |  |  |  |  |
Obligation threshold for debt to become guaranteed |  |  | $ 100,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument net issue discount |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |
Underwriting fees and other related expenses |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  |
Repurchase price obligation, percentage of principal amount redeemed in event of change of control |  |  | 101.00% |  |  |  |  |  |  |  |  |  |
Repurchase price obligation, percentage of principal amount redeemed |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Senior unsecured notes [Member] | 4.000% Senior Unsecured Notes Due May 2026 [Member] | 2026 Euro Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, face amount | € |  |  |  |  |  |  |  |  |  |  |  | € 450,000,000 |
Debt instrument interest rate |  |  |  |  |  |  |  |  |  |  | 4.00% | 4.00% |
Debt instrument maturity date | May 31, 2026 |  |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes, payment terms |  |  |  |  | The 2026 Euro Notes require payment of principal at maturity and payments of interest semi-annually in cash and in arrears on May 15 and November 15 of each year. |  |  |  |  |  |  |  |
Repurchase price obligation, percentage of principal amount redeemed in event of change of control |  |  |  |  |  |  |  |  |  |  | 101.00% | 101.00% |
Repurchase price obligation, percentage of principal amount redeemed | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price percentage of principal amount with net cash proceeds |  |  |  |  |  |  |  |  |  |  | 35.00% | 35.00% |
Debt instrument redemption price percentage of principal amount excluding redemption date |  |  |  |  |  |  |  |  |  |  | 104.00% | 104.00% |
Senior unsecured notes [Member] | 4.000% Senior Unsecured Notes Due May 2026 [Member] | Minimum [Member] | 2026 Euro Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |

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