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Debt and Lines of Credit - Narrative (Details) - 3 months ended Mar. 31, 2022 - Lines of credit
€ in Millions, $ in Millions
USD ($)
EUR (€)
Committed Line of Credit    
Financing Arrangements    
Amount outstanding under credit facilities $ 393  
Current borrowing capacity 806  
Committed Line of Credit | Revolving Loan And Letter Of Credit Facility Agreement    
Financing Arrangements    
Maximum borrowing capacity 1,800  
Committed Line of Credit | Revolving Loan And Letter Of Credit Facility Agreement | Subsidiaries    
Financing Arrangements    
Covenant minimum liquidity 1,250  
Covenant minimum liquidity, after repayments of debt $ 1,000  
Committed Line of Credit | Revolving Loan And Letter Of Credit Facility Agreement | Minimum    
Financing Arrangements    
Ratio of consolidated debt to tangible net worth (as a percent) 60.00%  
Committed Line of Credit | Revolving Loan And Letter Of Credit Facility Agreement | Maximum    
Financing Arrangements    
Ratio of consolidated debt to tangible net worth (as a percent) 100.00%  
Committed Line of Credit | Revolving Loan And Letter Of Credit Facility Agreement | Maximum | Subsidiaries    
Financing Arrangements    
Aggregate amount of debt $ 750 € 750
Uncommitted Line of Credit    
Financing Arrangements    
Amount outstanding under credit facilities $ 863