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Income Taxes (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2019

Sep. 30, 2018

Sep. 30, 2019

Sep. 30, 2018

Income Tax Contingency [Line Items]

Effective tax rate (as a percent)

7.00%

12.00%

7.00%

3.00%

Tax benefit from Disposal of Canadian Holdings

$ 47

Removal of deferred tax liabilities

$ 35

(23)

^[1]

INCOME TAX EXPENSE (BENEFIT)

$ (18)

$ 15

^[2]

(35)

13

^[2]

Taxes attributable to the noncontrolling interests

$ 38

$ 80

Tax Cuts and Jobs Act of 2017, income tax expense (benefit)

20

Accounting Standards Update 2017-05 [Member]

Income Tax Contingency [Line Items]

Income (loss) attributable to noncontrolling interest, before tax

231

Canada Revenue Agency [Member]

Income Tax Contingency [Line Items]

Removal of deferred tax liabilities

69

Domestic Tax Authority [Member]

Income Tax Contingency [Line Items]

INCOME TAX EXPENSE (BENEFIT)

$ 22

[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

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