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Long-Term Debt - Credit Facility (Details) - USD ($)				3 Months Ended	12 Months Ended
Long-Term Debt - Credit Facility (Details) - USD ($)	Aug. 09, 2019	May 31, 2018	Jul. 26, 2017	Sep. 28, 2019	Dec. 31, 2017	Dec. 31, 2019
Line of Credit Facility [Line Items]
Debt issuance costs			$ 5,000,000
Accelerated amortization of debt issuance costs		$ 6,000,000	6,000,000
Senior Notes
Line of Credit Facility [Line Items]
Accelerated amortization of debt issuance costs					$ 16,000,000
Outstanding principal redeemed					1,100,000,000
Make whole premium					$ 65,000,000
Loans Payable \| Term Loan A
Line of Credit Facility [Line Items]
Revolving credit facility maximum borrowing capacity	$ 608,000,000	670,000,000
Extinguishment of debt	445,000,000
Debt issuance costs, one time pretax charges		2,000,000
Percentage bearing variable interest, percentage rate						3.01%
Loans Payable \| Term Loan B
Line of Credit Facility [Line Items]
Extinguishment of debt		300,000,000
Debt issuance costs, one time pretax charges		1,000,000
Revolving Credit Agreement
Line of Credit Facility [Line Items]
Revolving credit facility maximum borrowing capacity			$ 500,000,000
Letters of credit						$ 5,000,000
Funds available for other borrowings						$ 995,000,000
Revolving credit facility interest rate						1.25%
Revolving Credit Agreement \| A&R Credit Agreement
Line of Credit Facility [Line Items]
Revolving credit facility maximum borrowing capacity	$ 1,000,000,000	$ 800,000,000				$ 1,000,000,000
Accelerated amortization of debt issuance costs				$ 4,000,000
Gain (loss) on contract termination				3,000,000
Payments of debt restructuring costs				$ 6,000,000