Basis of Presentation and Recent Accounting Pronouncements - Narrative (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
	Mar. 27, 2020	Mar. 26, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Business interest deductions percentage		30.00%
Accelerated cash tax benefit			$ 46		$ 46		$ 56
Income tax expense			75	$ 38	153	$ 105
CARES [Member]
Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Business interest deductions percentage	50.00%
Income tax expense			35
CARES [Member] | BEAT [Member]
Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Unrecognized income tax expense remaining			$ 12		12
CARES [Member] | Tax Year 2019 and 2020 [Member]
Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Business interest deductions percentage			50.00%
Accelerated cash tax benefit			$ 40		$ 40
Income tax expense			35
CARES [Member] | Tax Year 2019 [Member] | BEAT [Member]
Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Income tax expense			25
CARES [Member] | Tax Year 2020 [Member] | BEAT [Member]
Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Income tax expense			$ 22