XML 93 R82.htm IDEA: XBRL DOCUMENT v3.21.1
Regulatory Requirements (Regulatory Capital and Ratios) (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
CSC [Member]    
Common Equity Tier 1 Risk-Based Capital    
Actual Amount $ 24,297 $ 22,916
Actual Ratio 18.20% 18.50%
Minimum Capital Requirement Amount $ 5,993 $ 5,575
Minimum Capital Requirement Ratio 4.50% 4.50%
Tier 1 Risk-Based Capital    
Actual Amount $ 34,836 $ 30,649
Actual Ratio 26.20% 24.70%
Minimum Capital Requirement Amount $ 7,990 $ 7,433
Minimum Capital Requirement Ratio 6.00% 6.00%
Total Risk-Based Capital    
Actual Amount $ 34,874 $ 30,688
Actual Ratio 26.20% 24.80%
Minimum Capital Requirement Amount $ 10,653 $ 9,910
Minimum Capital Requirement Ratio 8.00% 8.00%
Tier 1 Leverage    
Actual Amount $ 34,836 $ 30,649
Actual Ratio 6.40% 6.30%
Minimum Capital Requirement Amount $ 21,631 $ 19,396
Minimum Capital Requirement Ratio 4.00% 4.00%
Supplemental Leverage Ratio    
Actual Amount $ 34,836 $ 30,649
Actual Ratio 6.40% 6.20%
Minimum Capital Requirement Amount $ 16,436 $ 14,744
Minimum Capital Requirement Ratio 3.00% 3.00%
CSB [Member]    
Common Equity Tier 1 Risk-Based Capital    
Actual Amount $ 21,111 $ 17,526
Actual Ratio 21.90% 19.20%
Minimum to be Well Capitalized Amount $ 6,256 $ 5,919
Minimum to be Well Capitalized Ratio 6.50% 6.50%
Minimum Capital Requirement Amount $ 4,331 $ 4,098
Minimum Capital Requirement Ratio 4.50% 4.50%
Tier 1 Risk-Based Capital    
Actual Amount $ 21,111 $ 17,526
Actual Ratio 21.90% 19.20%
Minimum to be Well Capitalized Amount $ 7,700 $ 7,285
Minimum to be Well Capitalized Ratio 8.00% 8.00%
Minimum Capital Requirement Amount $ 5,775 $ 5,464
Minimum Capital Requirement Ratio 6.00% 6.00%
Total Risk-Based Capital    
Actual Amount $ 21,130 $ 17,558
Actual Ratio 22.00% 19.30%
Minimum to be Well Capitalized Amount $ 9,625 $ 9,106
Minimum to be Well Capitalized Ratio 10.00% 10.00%
Minimum Capital Requirement Amount $ 7,700 $ 7,285
Minimum Capital Requirement Ratio 8.00% 8.00%
Tier 1 Leverage    
Actual Amount $ 21,111 $ 17,526
Actual Ratio 6.00% 5.50%
Minimum to be Well Capitalized Amount $ 17,481 $ 15,979
Minimum to be Well Capitalized Ratio 5.00% 5.00%
Minimum Capital Requirement Amount $ 13,985 $ 12,783
Minimum Capital Requirement Ratio 4.00% 4.00%
Supplemental Leverage Ratio    
Actual Amount $ 21,111 $ 17,526
Actual Ratio 5.90% 5.40%
Minimum Capital Requirement Amount $ 10,671 $ 9,763
Minimum Capital Requirement Ratio 3.00% 3.00%