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Debt - Carrying Values of Debt Instruments (Details) - USD ($)
Jun. 30, 2022
Jan. 31, 2022
Dec. 31, 2021
Nov. 30, 2021
Aug. 31, 2021
Mar. 06, 2020
Debt Instrument [Line Items]            
Finance leases $ 269,300,000          
Long-term debt, gross and lease obligation 12,025,900,000   $ 9,678,300,000      
Adjustments (122,600,000)   (123,900,000)      
Total Debt 11,903,300,000   9,554,400,000      
Less: current portion (313,800,000)   (8,200,000)      
Long-term portion 11,589,500,000   9,546,200,000      
Credit facilities: Uncommitted Credit Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity   $ 200,000,000 135,000,000      
Principal 137,500,000   0      
Adjustments 0   0      
Carrying Value 137,500,000   0      
Credit facilities: August 2026            
Debt Instrument [Line Items]            
Principal 714,400,000   24,300,000      
Adjustments 0   0      
Carrying Value 714,400,000   24,300,000      
Credit facilities: August 2026 | Line of Credit            
Debt Instrument [Line Items]            
Maximum borrowing capacity         $ 3,000,000,000  
Credit facilities: Term Loan            
Debt Instrument [Line Items]            
Interest Rate           0.832%
Principal 1,000,000,000   0      
Adjustments 0   0      
Carrying Value 1,000,000,000   0      
Credit facilities: Commercial Paper Facility            
Debt Instrument [Line Items]            
Principal 500,000,000   0      
Adjustments (400,000)   0      
Carrying Value $ 499,600,000   0      
Senior notes: May 2023            
Debt Instrument [Line Items]            
Interest Rate 4.75%          
Principal $ 300,000,000.0   300,000,000.0      
Adjustments (4,000,000.0)   (100,000)      
Carrying Value $ 296,000,000.0   299,900,000      
Senior notes: August 2024            
Debt Instrument [Line Items]            
Interest Rate 2.50%          
Principal $ 900,000,000.0   900,000,000.0      
Adjustments (4,000,000.0)   (4,800,000)      
Carrying Value $ 896,000,000.0   895,200,000      
Senior notes: March 2025            
Debt Instrument [Line Items]            
Interest Rate 3.20%          
Principal $ 500,000,000.0   500,000,000.0      
Adjustments (1,900,000)   (2,200,000)      
Carrying Value $ 498,100,000   497,800,000      
Senior notes: November 2025            
Debt Instrument [Line Items]            
Interest Rate 0.875%          
Principal $ 350,000,000.0   350,000,000.0      
Adjustments (2,300,000)   (2,600,000)      
Carrying Value $ 347,700,000   347,400,000      
Senior notes: July 2026            
Debt Instrument [Line Items]            
Interest Rate 2.90%          
Principal $ 500,000,000.0   500,000,000.0      
Adjustments (2,500,000)   (2,800,000)      
Carrying Value $ 497,500,000   497,200,000      
Senior notes: November 2027            
Debt Instrument [Line Items]            
Interest Rate 3.375%          
Principal $ 650,000,000.0   650,000,000.0      
Adjustments (3,400,000)   (3,800,000)      
Carrying Value $ 646,600,000   646,200,000      
Senior notes: May 2028            
Debt Instrument [Line Items]            
Interest Rate 3.95%          
Principal $ 800,000,000.0   800,000,000.0      
Adjustments (11,600,000)   (12,400,000)      
Carrying Value $ 788,400,000   787,600,000      
Senior notes: March 2030            
Debt Instrument [Line Items]            
Interest Rate 2.30%          
Principal $ 600,000,000.0   600,000,000.0      
Adjustments (5,600,000)   (5,900,000)      
Carrying Value $ 594,400,000   594,100,000      
Senior notes: February 2031            
Debt Instrument [Line Items]            
Interest Rate 1.45%          
Principal $ 650,000,000.0   650,000,000.0      
Adjustments (7,500,000)   (7,900,000)      
Carrying Value $ 642,500,000   642,100,000      
Senior notes: February 2032            
Debt Instrument [Line Items]            
Interest Rate 1.75%          
Principal $ 750,000,000.0   750,000,000.0      
Adjustments (6,300,000)   (6,600,000)      
Carrying Value $ 743,700,000   743,400,000      
Senior Notes Due March 2033            
Debt Instrument [Line Items]            
Interest Rate 2.375%          
Principal $ 700,000,000.0   700,000,000.0 $ 700,000,000    
Adjustments (7,400,000)   (7,600,000)      
Carrying Value $ 692,600,000   692,400,000      
Senior notes: March 2035            
Debt Instrument [Line Items]            
Interest Rate 6.086%          
Principal $ 181,900,000   181,900,000      
Adjustments (12,500,000)   (12,800,000)      
Carrying Value $ 169,400,000   169,100,000      
Senior notes: March 2040            
Debt Instrument [Line Items]            
Interest Rate 6.20%          
Principal $ 399,900,000   399,900,000      
Adjustments (3,500,000)   (3,600,000)      
Carrying Value $ 396,500,000   396,300,000      
Senior notes: May 2041            
Debt Instrument [Line Items]            
Interest Rate 5.70%          
Principal $ 385,700,000   385,700,000      
Adjustments (4,900,000)   (5,000,000.0)      
Carrying Value $ 380,800,000   380,700,000      
Senior notes: March 2050            
Debt Instrument [Line Items]            
Interest Rate 3.05%          
Principal $ 400,000,000.0   400,000,000.0      
Adjustments (7,000,000.0)   (7,100,000)      
Carrying Value $ 393,000,000.0   392,900,000      
Debentures: September 2035            
Debt Instrument [Line Items]            
Interest Rate 7.40%          
Principal $ 148,100,000   148,000,000.0      
Adjustments (30,600,000)   (31,100,000)      
Carrying Value 117,500,000   116,900,000      
Tax-exempt: 2023 - 2051            
Debt Instrument [Line Items]            
Principal 1,189,100,000   1,189,100,000      
Adjustments (7,400,000)   (7,600,000)      
Carrying Value $ 1,181,800,000   1,181,500,000      
Tax-exempt: 2023 - 2051 | Minimum            
Debt Instrument [Line Items]            
Interest Rate 0.30%          
Tax-exempt: 2023 - 2051 | Maximum            
Debt Instrument [Line Items]            
Interest Rate 2.60%          
Finance leases: 2022 - 2063            
Debt Instrument [Line Items]            
Finance leases $ 269,300,000   $ 249,400,000      
Finance leases: 2022 - 2063 | Minimum            
Debt Instrument [Line Items]            
Interest Rate 0.806%          
Finance leases: 2022 - 2063 | Maximum            
Debt Instrument [Line Items]            
Interest Rate 9.75%