Debt - Debt With A Contractual Term Greater Than One Year (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items]
Long-term debt, net	$ 6,872,935	$ 6,463,466
Current portion of long-term debt, net	(1,748,109)	(1,575,799)
Long-term debt	5,124,826	4,887,667
Secured Debt
Debt Instrument [Line Items]
Unamortized discounts and debt issuance costs	(2,573)	(49)
Long-term debt, net	1,369,512	833,835
Secured Debt | Asset-backed Canadian commercial paper conduit facility
Debt Instrument [Line Items]
Long-term debt, gross	114,693	155,951
Secured Debt | Asset-Backed U.S. Commercial Paper Conduit Facility VIE
Debt Instrument [Line Items]
Long-term debt, gross	490,427	582,717
Secured Debt | Term asset-backed securitization debt, VIE
Debt Instrument [Line Items]
Long-term debt, gross	766,965	95,216
Medium-term Notes
Debt Instrument [Line Items]
Unamortized discounts and debt issuance costs	(12,809)	(12,993)
Long-term debt, net	4,760,127	4,887,007
Medium-term Notes | 2.25% Medium-term notes due 2019
Debt Instrument [Line Items]
Long-term debt, gross	0	600,000
Medium-term Notes | Floating-Rate Medium Term Notes due 2019
Debt Instrument [Line Items]
Long-term debt, gross	0	150,000
Medium-term Notes | Two Point Four Percent Medium-Term Notes Due 2019
Debt Instrument [Line Items]
Long-term debt, gross	0	600,000
Medium-term Notes | 2.15% Medium-term notes due 2020
Debt Instrument [Line Items]
Long-term debt, gross	600,000	600,000
Medium-term Notes | Floating-Rate Medium Term Notes due 2020
Debt Instrument [Line Items]
Long-term debt, gross	450,000	450,000
Medium-term Notes | Two Point Four Percent Medium-Term Notes Due 2020
Debt Instrument [Line Items]
Long-term debt, gross	350,000	350,000
Medium-term Notes | Two Point Eighty-five Percent Medium-Term Notes Due 2021
Debt Instrument [Line Items]
Long-term debt, gross	600,000	600,000
Medium-term Notes | Floating-Rate Medium Term Notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross	450,000	450,000
Medium-term Notes | Three Point Fifty-five Percent Medium Term Notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross	350,000	350,000
Medium-term Notes | Four Point Zero Five Percent Medium-Term Notes Due 2022
Debt Instrument [Line Items]
Long-term debt, gross	550,000	0
Medium-term Notes | Two Point Fifty-five Percent Medium-Term Notes Due 2022
Debt Instrument [Line Items]
Long-term debt, gross	400,000	400,000
Medium-term Notes | Three Point Thirty-five Percent Medium Term Notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	350,000	350,000
Medium-term Notes | Three Point Fourteen Percent Medium Term Notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross	672,936	0	€ 600,000,000.0
Senior Notes
Debt Instrument [Line Items]
Unamortized discounts and debt issuance costs	(6,704)	(7,376)
Long-term debt, net	743,296	742,624
Senior Notes | 3.50% Senior unsecured notes due in 2025
Debt Instrument [Line Items]
Long-term debt, gross	450,000	450,000
Senior Notes | 4.625% Senior unsecured notes due in 2045
Debt Instrument [Line Items]
Long-term debt, gross	300,000	300,000
Senior Unsecured Debt
Debt Instrument [Line Items]
Long-term debt, net	$ 5,503,423	$ 5,629,631
Senior Unsecured Debt | 2.25% Medium-term notes due 2019
Debt Instrument [Line Items]
Stated interest rate	2.25%	2.25%	2.25%
Senior Unsecured Debt | Two Point Four Percent Medium-Term Notes Due 2019
Debt Instrument [Line Items]
Stated interest rate	2.40%	2.25%	2.40%
Senior Unsecured Debt | Floating-Rate Medium Term Notes due 2020
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%	0.50%
Senior Unsecured Debt | Two Point Eighty-five Percent Medium-Term Notes Due 2021
Debt Instrument [Line Items]
Stated interest rate	2.85%	2.85%	2.85%
Senior Unsecured Debt | Floating-Rate Medium Term Notes due 2021
Debt Instrument [Line Items]
Basis spread on variable rate	0.94%	0.94%
Senior Unsecured Debt | Two Point Fifty-five Percent Medium-Term Notes Due 2022
Debt Instrument [Line Items]
Stated interest rate	2.55%	2.55%	2.55%
Senior Unsecured Debt | Three Point Thirty-five Percent Medium Term Notes due 2023
Debt Instrument [Line Items]
Stated interest rate	3.35%	3.35%	3.35%
Senior Unsecured Debt | Three Point Fourteen Percent Medium Term Notes due 2024
Debt Instrument [Line Items]
Stated interest rate	3.14%	3.14%	3.14%
Senior Unsecured Debt | 3.50% Senior unsecured notes due in 2025
Debt Instrument [Line Items]
Stated interest rate	3.50%	3.50%	3.50%
Senior Unsecured Debt | 4.625% Senior unsecured notes due in 2045
Debt Instrument [Line Items]
Stated interest rate	4.625%	4.625%	4.625%
London Interbank Offered Rate (LIBOR) | Senior Unsecured Debt | Floating-Rate Medium Term Notes due 2019
Debt Instrument [Line Items]
Basis spread on variable rate	0.35%	0.35%
London Interbank Offered Rate (LIBOR) | Senior Unsecured Debt | 2.15% Medium-term notes due 2020
Debt Instrument [Line Items]
Stated interest rate	2.15%	2.15%	2.15%
London Interbank Offered Rate (LIBOR) | Senior Unsecured Debt | Two Point Four Percent Medium-Term Notes Due 2020
Debt Instrument [Line Items]
Stated interest rate	2.40%	2.40%	2.40%
London Interbank Offered Rate (LIBOR) | Senior Unsecured Debt | Three Point Fifty-five Percent Medium Term Notes due 2021
Debt Instrument [Line Items]
Stated interest rate	3.55%	3.55%	3.55%
London Interbank Offered Rate (LIBOR) | Senior Unsecured Debt | Four Point Zero Five Percent Medium-Term Notes Due 2022
Debt Instrument [Line Items]
Stated interest rate	4.05%	4.05%	4.05%