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Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Balance at beginning of period | $ 2,293 | $ 2,731 |
Total other comprehensive (loss) | (18) | (2) |
Balance at end of period | 2,394 | 2,971 |
Cash Flow Hedges |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Balance at beginning of period | (16) | (14) |
Other comprehensive loss before reclassifications | (23) | (1) |
Amounts reclassified from accumulated other comprehensive loss | 1 | (1) |
Total other comprehensive (loss) | (22) | (2) |
Balance at end of period | (38) | (16) |
Foreign Currency Translation |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Balance at beginning of period | (49) | (38) |
Other comprehensive loss before reclassifications | 4 | 0 |
Amounts reclassified from accumulated other comprehensive loss | 0 | 0 |
Total other comprehensive (loss) | 4 | 0 |
Balance at end of period | (45) | (38) |
Other |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Balance at beginning of period | (2) | (2) |
Other comprehensive loss before reclassifications | 0 | 0 |
Amounts reclassified from accumulated other comprehensive loss | 0 | 0 |
Total other comprehensive (loss) | 0 | 0 |
Balance at end of period | (2) | (2) |
Total |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Balance at beginning of period | (67) | (54) |
Other comprehensive loss before reclassifications | (19) | (1) |
Amounts reclassified from accumulated other comprehensive loss | 1 | (1) |
Total other comprehensive (loss) | (18) | (2) |
Balance at end of period | $ (85) | $ (56) |
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2017-12 | Cash Flow Hedges |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | $ 3
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2017-12 | Foreign Currency Translation |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | 0
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2017-12 | Other |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | 0
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2017-12 | Total |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | 3
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2018-02 | Cash Flow Hedges |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | (3)
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2018-02 | Foreign Currency Translation |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | 0
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2018-02 | Other |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | 0
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2018-02 | Total |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Cumulative-effect adjustment of ASU adoption |  |  | $ (3)

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