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Fair Value Measurements (Narrative) (Details)
$ in Millions
1 Months Ended
Jun. 28, 2019
USD ($)
Derivative, notional amount $ 10,179.2
Interest rate swap agreements | Cash flow hedging  
Derivative, notional amount $ 850.0
Interest rate swap agreements | Cash flow hedging | Minimum  
Derivative, term of contract 10 years
Interest rate swap agreements | Cash flow hedging | Maximum  
Derivative, term of contract 30 years