Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

The following table provides a summary of the Company's outstanding long-term debt and the fair values based on quoted market prices in less active markets as of December 31, 2018 and December 31, 2017:

					Level 2 Fair Value as of
	Principal Amount at Par	Issuance Date	Maturity	Interest Due Dates	December 31, 2018		December 31, 2017
	(in millions)				(in millions)
5.375% Senior Notes	500	February 2013	February 2021	February and August	$	509	$	530
5.50% Senior Notes	700	February 2015	February 2022	April and October	706		739
5.750% Senior Notes	400	February 2014	March 2024	March and September	407		427
5.875% Senior Notes	800	February 2015	February 2025	April and October	812		856
4.375% Senior Notes	1,000	October 2016	November 2026	May and November	915		983
3.625% Senior Notes (1)	1,489	May 2017	May 2027	May and November	1,446		1,575
4.875% Senior Notes	1,600	October 2017	April 2028	April and October	1,464		1,571
5.875% Senior Notes	1,900	April 2018	November 2028	May and November	1,851		—
4.625% Senior Notes (2)	1,260	October 2018	May 2029	May and November	1,241		—
6.375% Senior Notes	800	October 2018	May 2029	May and November	797		—
	10,449

(1) Debt is denominated in euro with a €1,300 million principal amount. Total proceeds were $1,421 million. 

(2) Debt is denominated in euro with a €1,100 million principal amount. Total proceeds were $1,262 million.

Schedule of Expected Timing of Principal and Interest Payments for the Notes

The expected timing of principal and interest payments for these Notes are as follows:

	As of
	December 31, 2018		December 31, 2017
	(in thousands)
Less than one year	$	538,384	$	311,339
Due after one year and through three years	1,550,581		627,444
Due after three years and through five years	1,646,101		1,761,465
Due after five years	11,138,129		6,348,580
Total debt obligations	$	14,873,195	$	9,048,828