XML 61 R56.htm IDEA: XBRL DOCUMENT v3.20.1
Changes in Accumulated Other Comprehensive Income by Component - Summary of Changes in AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period $ 8,120.9 $ 7,929.5
Other comprehensive income before reclassifications (20.6)  
Amounts reclassified from accumulated other comprehensive income 0.8 (0.1)
Other comprehensive loss, net of tax (19.8) (11.4)
Balance at end of period 8,120.2 7,922.6
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period 2.2 30.8
Balance at end of period (17.6) $ 22.5
Cash Flow Hedge    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (13.7)  
Other comprehensive income before reclassifications (22.2)  
Amounts reclassified from accumulated other comprehensive income 0.8  
Other comprehensive loss, net of tax (21.4)  
Balance at end of period (35.1)  
Defined Benefit Pension Items    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period 15.9  
Other comprehensive income before reclassifications 1.6  
Amounts reclassified from accumulated other comprehensive income 0.0  
Other comprehensive loss, net of tax 1.6  
Balance at end of period $ 17.5