Debt and Credit Agreements Schedule of Long-term Debt Instruments (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

A summary of the carrying amounts and fair values of our long-term debt is listed below.

	Effective Interest Rate		December 31,
			2019				2018
			Book Value		Fair Value 1		Book Value		Fair Value 1
3.50% Senior Notes due 2020 (less unamortized discount and issuance costs of $0.4 and $1.1, respectively)	3.89	%	$	498.5	$	505.4	$	496.6	$	499.9
3.75% Senior Notes due 2021 (less unamortized discount and issuance costs of $0.2 and $1.9, respectively)	3.98	%	497.9		513.5		496.8		503.2
4.00% Senior Notes due 2022 (less unamortized discount and issuance costs of $0.7 and $0.6, respectively)	4.13	%	248.7		258.8		248.2		250.3
3.75% Senior Notes due 2023 (less unamortized discount and issuance costs of $0.5 and $1.3, respectively)	4.32	%	498.2		522.8		497.7		491.4
4.20% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.4 and $1.8, respectively)	4.24	%	497.8		538.1		497.3		492.6
4.65% Senior Notes due 2028 (less unamortized discount and issuance costs of $1.5 and $3.9, respectively)	4.78	%	494.6		564.3		494.0		494.1
5.40% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.7 and $5.4, respectively)	5.48	%	491.9		617.1		491.7		474.1
Term Loan due 2021 - LIBOR plus 1.25%			—		—		400.0		400.0
Other notes payable and capitalized leases			46.3		45.5		38.0		38.0
Total long-term debt			3,273.9				3,660.3
Less: current portion			502.0				0.1
Long-term debt, excluding current portion			$	2,771.9			$	3,660.2

1

See Note 13 for information on the fair value measurement of our long-term debt.