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Financing Arrangements and Derivative Financial Instruments - Notes and Credit Facilities Narrative (Details) | 1 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2017 | Jun. 30, 2018 USD ($) | Jun. 30, 2018 EUR (€) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 EUR (€) | Oct. 16, 2017 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable |  | $ 3,318,000,000 |  | $ 3,325,000,000 |  |
Long-term debt, before deferred financing fees |  | 6,012,000,000 |  | 5,468,000,000 |  |
$2.0 Billion First Lien Revolving Credit Facility due 2021 | Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  | 2,000,000,000.0 |  |  |  |
Additional borrowing capacity which may be requested |  | 250,000,000 |  |  |  |
$2.0 Billion First Lien Revolving Credit Facility due 2021 | Line of Credit | Letter of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  | 800,000,000 |  |  |  |
Letters of credit outstanding |  | $ 37,000,000 |  | 37,000,000 |  |
$2.0 Billion First Lien Revolving Credit Facility due 2021 | Line of Credit | Letter of Credit | LIBOR |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.25% |  |  |  |
$2.0 Billion First Lien Revolving Credit Facility due 2021 | Line of Credit | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  | $ 2,000,000,000.0 |  | 2,000,000,000.0 |  |
Annual commitment fee on undrawn amounts |  | 0.30% |  |  |  |
Borrowing base amount below stated amount |  | $ 361,000,000 |  |  |  |
Long-term debt, before deferred financing fees |  | 340,000,000 |  | 0 |  |
Maximum borrowing base increase based on value of certain cash |  | 200,000,000 |  |  |  |
Second lien term loan facility due 2025 | Line of Credit | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, before deferred financing fees |  | $ 400,000,000 |  | 400,000,000 |  |
Fee amount to reduce effect rate, percentage of Principal Amount |  | 1.00% | 1.00% |  |  |
Leverage ratio threshold |  | 1.25 | 1.25 |  |  |
Debt instrument, optional reduction of basis spreads on variable rates | 0.25% |  |  |  |  |
Second lien term loan facility due 2025 | Line of Credit | Secured Debt | LIBOR |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 2.00% |  |  |  |  |
Debt instrument, basis spread on reference rate | 1.00% |  |  |  |  |
Second lien term loan facility due 2025 | Line of Credit | Secured Debt | Alternative Base Rate |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 1.00% |  |  |  |  |
Second lien term loan facility due 2025 | Line of Credit | Secured Debt | Federal Funds Rate |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on reference rate | 0.50% |  |  |  |  |
European Revolving Credit Facility | Line of Credit | Letter of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | € 50,000,000 |  |  |
Letters of credit outstanding |  | $ 0 |  | 0 |  |
European Revolving Credit Facility | Line of Credit | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | 550,000,000 |  |  |
Annual commitment fee on undrawn amounts |  | 0.30% |  |  |  |
Amount outstanding |  |  |  | 0 |  |
European Revolving Credit Facility | Line of Credit | Revolving Credit Facility | LIBOR |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.75% |  |  |  |
European Revolving Credit Facility | Line of Credit | Revolving Credit Facility | EURIBOR |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.75% |  |  |  |
European Revolving Credit Facility | Line of Credit | German Tranche |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | 125,000,000 |  |  |
Amount outstanding |  | $ 140,000,000 | 120,000,000 |  |  |
European Revolving Credit Facility | Line of Credit | All-borrower Tranche |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | 425,000,000 |  |  |
Amount outstanding |  | 170,000,000 | 146,000,000 |  |  |
European Revolving Credit Facility | Line of Credit | Swingline Loan |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | 150,000,000 |  |  |
Pan-European Accounts Receivable Facility | Line of Credit | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  |  |  |  | € 275,000,000
Long-term debt, before deferred financing fees |  | 177,000,000 |  | 224,000,000 |  |
Current borrowing capacity |  | 177,000,000 | 152,000,000 | 224,000,000 | € 187,000,000 |
Pan-European Accounts Receivable Facility | Line of Credit | Secured Debt | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | 30,000,000 |  |  |
Pan-European Accounts Receivable Facility | Line of Credit | Secured Debt | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity | € |  |  | € 450,000,000 |  |  |
Accounts Receivable Factoring Facilities | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Off-balance sheet receivables sold |  | 513,000,000 |  | 572,000,000 |  |
Mexican credit facilities | Line of Credit | Foreign Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, before deferred financing fees |  | 340,000,000 |  | 340,000,000 |  |
Chinese Credit Facilities | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amount outstanding |  | 173,000,000 |  | 212,000,000 |  |
Unused availability |  | 123,000,000 |  |  |  |
Restricted cash related to funds obtained under credit facilities |  | 9,000,000 |  | 7,000,000 |  |
Chinese Credit Facilities | Line of Credit | Foreign Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt, before deferred financing fees |  | $ 173,000,000 |  | $ 212,000,000 |  |

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