Debt (Tables)

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Carrying values of the senior notes

Summarized below are the carrying values of our senior notes at June 30, 2016 and December 31, 2015:

	June 30, 2016		December 31, 2015
1.900% senior notes due 2017	$	501.3	$	499.9
2.125% senior notes due 2018	997.3		996.7
2.300% senior notes due 2018	402.5		400.2
2.250% senior notes due 2019	511.9		502.6
2.875% senior notes due 2020	1,491.8		1,490.9
3.950% senior notes due 2020	521.4		504.9
3.250% senior notes due 2022	1,060.1		1,010.5
3.550% senior notes due 2022	992.9		992.4
4.000% senior notes due 2023	746.7		706.0
3.625% senior notes due 2024	1,001.6		994.9
3.875% senior notes due 2025	2,483.6		2,461.8
5.700% senior notes due 2040	247.2		247.2
5.250% senior notes due 2043	392.9		392.8
4.625% senior notes due 2044	986.7		986.6
5.000% senior notes due 2045	1,974.2		1,974.0
Total long-term debt	$	14,312.1	$	14,161.4