Income Taxes - Federal Statutory Corporate Tax Rate Reconciles to Our Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed expected tax	$ 150.4	$ 131.5	$ 77.8
State income taxes, net of federal tax benefit	15.6	13.4	6.2
Foreign earnings taxed at different rates	16.2	10.5	10.5
U.S. tax on foreign earnings	14.3	24.0	29.0
Tax credits	(30.2)	(27.8)	(50.1)
Unremitted foreign earnings	0.0	2.5	10.0
Reorganization and divestitures	0.0	0.4	(47.2)
Withholding tax	4.7	4.2	4.8
Net change in valuation allowance	3.6	(5.2)	(7.6)
Net change in unrecognized tax benefits	19.6	(1.1)	36.5
Legislative Changes	5.1	(22.4)	0.0
Deferred tax adjustments	11.4	3.0	0.9
Other	14.3	9.1	5.8
Total income tax provision	$ 225.0	$ 142.1	$ 76.6
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Computed expected tax	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit	2.20%	2.10%	1.70%
Foreign earnings taxed at different rates	2.20%	1.70%	2.80%
U.S. tax on foreign earnings	2.00%	3.80%	7.80%
Tax credits	(4.20%)	(4.40%)	(13.50%)
Unremitted foreign earnings	0.00%	0.40%	2.70%
Reorganization and divestitures	0.00%	0.10%	(12.70%)
Withholding tax	0.70%	0.70%	1.30%
Net change in valuation allowance	0.50%	(0.80%)	(2.10%)
Net change in unrecognized tax benefits	2.70%	(0.20%)	9.90%
Legislative Changes	0.70%	(3.60%)	0.00%
Deferred tax adjustments	1.60%	0.50%	0.20%
Other	2.00%	1.40%	1.60%
Income tax provision and rate	31.40%	22.70%	20.70%